Van Der Wiel
Appolonius Jacobus Van Der Wiel, Duisburg BE
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20130285167 | TMAP SENSOR SYSTEMS AND METHODS FOR MANUFACTURING THOSE - A pressure sensor system comprising a pressure sensor chip is disclosed. The pressure sensor chip comprises a sensing side where pressure sensing is performed and one or more interconnections where electrical connections are made at the other side of the chip. The pressure sensor comprising an integrated circuit ( | 10-31-2013 |
20150142342 | Method and Device for Sensing Isotropic Stress and Providing a Compensation for the Piezo-Hall Effect - A method determines isotropic stress by means of a Hall element which includes a plate-shaped area made of a doped semiconductor material and comprises four contacts contacting the plate-shaped area and forming corners of a quadrangle, two neighboring corners of the quadrangle defining an edge thereof. At least one van der Pauw transresistance value in at least one van der Pauw measurement set-up of the Hall element is determined, wherein the four contacts of the Hall element form contact pairs, a contact pair comprising two contacts defining neighbouring corners of the quadrangle. One contact pair supplies a current and the other contact pair measures a voltage. A relationship between the supplied current and the measured voltage defines the Van der Pauw transresistance value. The method comprises determining a stress signal which depends on the at least one Van der Pauw transresistance value and determining isotropic stress. | 05-21-2015 |
20150177069 | INFRARED THERMAL SENSOR WITH GOOD SNR - An infrared thermal sensor for detecting infrared radiation, comprising a substrate and a cap structure together forming a sealed cavity, the cavity comprising a gas at a predefined pressure; a membrane arranged in said cavity for receiving infrared radiation; a plurality of beams for suspending the membrane; a plurality of thermocouples for measuring a temperature difference between the membrane and the substrate; wherein the ratio of the thermal resistance between the membrane and the substrate through the thermocouples, and the thermal resistance between the membrane and the substrate through the beams and through the gas is a value in the range of 0.8 to 1.2. A method of designing such a sensor, and a method of producing such a sensor is also disclosed. | 06-25-2015 |
20150177070 | INFRARED THERMAL SENSOR WITH BEAMS HAVING DIFFERENT WIDTHS - An infrared thermal sensor for detecting infrared radiation is described. It comprises a substrate and a cap structure together forming a sealed cavity. A membrane is suspended therein by a plurality of beams, each beam comprising at least one thermocouple arranged therein or thereon for measuring a temperature difference between the membrane and the substrate. At least two beams have a different length and each of the thermocouples have a substantially same constant width to length ratio such that the thermal resistance measured between the membrane and the substrate is substantially constant for each beam, and such that the electrical resistance measured between the membrane and the substrate is substantially constant for each beam. The beams may be linear, and be oriented in a non-radial direction. | 06-25-2015 |
Appolonius Jacobus Van Der Wiel, Tervuren BE
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20130118250 | CALORIMETRIC FLOW METER HAVING HIGH HEAT CONDUCTIVITY STRIPS - A flow meter includes a heater for heating a fluid flow along a membrane. A temperature difference is measured between and upstream point and a downstream point. There are additionally provided one or more strips of material having a relatively high heat conductivity. Strips that are substantially perpendicular to the flow direction direct heat from the heater to the sides of the membrane, causing a large proportion of the heat that would otherwise drive heat flows to be dispersed and decreases inaccuracies or bias in the measured flow rate. Strips of material that are provided parallel to the flow direction act to direct heat from the heater along the direction of flow. This increases the proportion of heat that flows along this axis and guides the flow and hence reduces the proportion of heat available to drive heat flows that cause inaccuracies and bias in the measured flow rates. | 05-16-2013 |
Appolonius Jacobus Van Der Wiel, Duisberg BE
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20150179861 | ETCHING OF INFRARED SENSOR MEMBRANE - The invention relates to an infrared thermal sensor comprising a substrate having a cavity, a cavity bottom wall formed by a continuous substrate surface. The sensor comprises a membrane adapted for receiving heat from incident infrared radiation, a beam suspending the membrane, and a thermocouple. This membrane comprises openings extending through the membrane for facilitating the passage of an anisotropic etchant for etching the cavity during manufacture. Each opening has a cross-section with a length to width ratio of at least 4. The width direction of respectively a first and a second set of openings is oriented according to respectively a first crystallographic orientation and a second crystallographic orientation, these orientations corresponding to different directions lying in loosely packed crystal lattice faces of the semiconductor substrate. | 06-25-2015 |
Marijn Jan Van Der Wiel, The Hague NL
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20100264172 | APPARATUS FOR DISPENSING A LIQUID, SUCH AS VISCOUS, SUBSTANCE - An apparatus for dispensing a liquid substance, for example a viscous substance such as tooth paste or soap, comprises a storage chamber for the substance in communication with a substance outlet, an expulsion member for forcing the substance from the storage chamber towards the substance outlet and a drive mechanism for driving the expulsion member. The expulsion member comprises a plunger provided with a first thread, wherein the drive mechanism comprises a drive nut with corresponding second thread for engaging the first thread, wherein the drive nut is rotatable with respect to the plunger, for instance through a longitudinal movement of the storage chamber in parallel to the plunger. | 10-21-2010 |
Wilfred Gerard Van Der Wiel, Me Enschede NL
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20130220971 | METHOD FOR MANUFACTURING A MULTILAYER STRUCTURE WITH A LATERAL PATTERN FOR APPLICATION IN THE XUV WAVELENGTH RANGE, AND BF AND LMAG STRUCTURES MANUFACTURED ACCORDING TO THIS METHOD - Method for manufacturing a multilayer structure with a lateral pattern, in particular of an optical grating for application in an optical device for electromagnetic radiation with a wavelength in the wavelength range between 0.1 nm and 100 nm, comprising the steps of (i) providing a multilayer structure, and (ii) arranging a lateral three-dimensional pattern in the multilayer structure, wherein step (ii) of arranging the lateral pattern is performed by means of a method for nano-imprint lithography (NIL), and BF and LMAG structures manufactured according to this method. | 08-29-2013 |
Wilfred Gerard Van Der Wiel, Enschede NL
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20130248349 | PHOTOCATALYTIC WATER SPLITTING - The invention is directed to a method for photocatalytic water splitting, and to an apparatus for carrying out said method. | 09-26-2013 |